JPH08326519A - Lubricating oil feeder for engine - Google Patents

Abstract

PURPOSE: To maintain lubricating function for many hours by supplying lubricating oil when the total engine speed obtained by integrating the engine speed while correcting it according to load reaches the reference integrated value, and correcting the reference integrated value according to the deteriorated degree of lubricating oil. CONSTITUTION: An ECU 92 integrates engine speed from an engine speed detecting sensor 91a by an engine speed integrating means 92a while correcting the engine speed according to the detected load from a load detecting sensor 91c, and stores the total integrated engine speed in a memory 92b. The ECU 92 is provided with an oil feed-discharge control means 92c for controlling the opening/closing of a solenoid valve 24b for feeding the reference supply quantity of lubricating oil when the total integrated engine speed reaches the reference integrated value, and a reference integrated value correcting means 92e. The reference integrated value correcting means 92e judges the degraded degree of lubricating oil from the deterioration map value, indicating the base value change of lubricating oil, inputted through a correction factor memory 921 and the frequency of supply from a memory 92f stored with the frequency of supply, and corrects the reference integrated value onto the smaller side as the deteriorated degree is larger.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating oil supply apparatus suitable for a four-cycle engine, which supplies new lubricating oil according to the deterioration state of the lubricating oil in the engine.

[0002]

2. Description of the Related Art A lubrication device for a four-cycle engine stores, for example, lubricating oil in an oil pan, and the lubricating oil is pressure-fed by an oil pump.
It is configured to supply oil to lubricated parts such as the camshaft journal part and the valve train. In the case where this type of lubricating device is provided, in order to continuously operate the engine for a long time, it is necessary to replenish the oil pan with an amount of lubricating oil commensurate with the amount of lubricating oil consumed.

As an engine lubricating oil supply device for supplying lubricating oil according to such lubricating oil consumption,
Conventionally, as disclosed in, for example, Japanese Patent Application Laid-Open No. 3-246310, the operating time of an engine is integrated, and lubricating oil is supplied to an oil pan every time the integrated operating time reaches a reference time. There is something.

[0004]

However, there is a concern that the lubricating function of the engine cannot be maintained for a long time in the case where the lubricating oil is replenished according to the engine operating time as in the above-mentioned conventional publication. That is, since the lubricating oil deteriorates depending on the number of operating hours and operating conditions of the engine, a method of simply replenishing the lubricating oil and holding it at a predetermined amount cannot cope with the deterioration of the quality of the lubricating oil and may adversely affect the engine life. There is.

The present invention has been made in view of the above-mentioned conventional circumstances, and an object thereof is to provide a lubricating oil supply device for an engine capable of suppressing deterioration of quality due to deterioration of lubricating oil and maintaining a lubricating function for a long time. I am trying.

[0006]

According to a first aspect of the present invention, the engine load detecting means, the engine speed detecting means, and the engine speed are integrated while correcting the engine speed to a larger value as the load increases according to the engine load. An engine speed integrating means for
Lubricating means for supplying lubricating oil into the engine when the accumulated total engine speed reaches a preset reference accumulated number, and the reference accumulated number is the type of fuel, the type of lubricating oil, or the number of times of lubricating oil replenishment. Such as at least one of the factors affecting the deterioration degree of the lubricating oil or the deterioration degree detected by the deterioration degree detecting means, and the accumulated engine speed is corrected as described above. And a lubrication control means for controlling the lubrication means so that the lubricating oil is supplied when the cumulative number is reached.

According to the second aspect of the present invention, the engine load detecting means, the engine speed detecting means, and the engine speed integrating means for integrating the engine speed while correcting the engine speed to a larger value as the load increases according to the engine load. The lubricating oil supply means for replenishing the lubricating oil when the accumulated total engine speed reaches a preset reference accumulated speed, the discharging means for discharging the residual lubricating oil in the engine, and the lubricating oil amount in the engine. The oil level detection means for detecting, the first deterioration degree set value set based on one or both of the fuel and the type of the lubricating oil that influence the deterioration degree of the lubricating oil, and the larger the number of lubricating oil replenishments, the larger The third deterioration degree set value and the first deterioration degree set value that are set are corrected to larger values as the number of lubrication oil replenishments increases.
The set amount of residual lubricating oil in the engine is discharged in accordance with the deterioration degree set value, and the deterioration degree detected by any one of the four deterioration degree detection values based on the deterioration degree detection means arranged so as to come into contact with the lubricating oil. And an oil supply control means for controlling the oil supply means so that the lubricating oil is supplied until the oil level reaches the upper limit position after the oil is discharged by the oil discharge means. It is characterized by having and.

According to a third aspect of the present invention, in the second aspect, the first deterioration degree set value and the lubricating oil are set based on one or both of the fuel and the type of the lubricating oil that influence the deterioration degree of the lubricating oil. The second deterioration degree set value and the first deterioration degree set value, which are set larger as the number of times of replenishment is increased, are corrected to a larger value as the number of times of replenishment of lubricating oil is increased. A reference integration number for correcting the reference integration number to be smaller as the deterioration level is larger, according to the deterioration level due to any one of the four deterioration level detection values based on the deterioration level detection means arranged so as to come into contact with each other. It is characterized in that a correction means is provided.

[0009]

According to the first aspect of the present invention, the lubricating oil is replenished into the engine when the total engine speed accumulated while correcting the engine speed according to the load reaches the reference integrated number. For example, since the lubricating oil consumption due to so-called oil rising, in which lubricating oil enters the combustion chamber and burns, is considered to depend on the total engine speed and engine load,
It is possible to replenish the amount of lubricating oil that accurately corresponds to the amount of lubricating oil consumed, as compared with the case of replenishing only according to the engine operating time of the conventional device.

The reference cumulative number is corrected according to the deterioration degree of the lubricating oil, for example, the higher the deterioration degree is, the smaller the reference cumulative number is corrected. Therefore, the higher the deterioration degree, the more frequently the lubricating oil is supplied. Since the quality deterioration due to the deterioration of the lubricating oil can be suppressed, the lubricating function can be maintained for a long time, and the engine durability can be improved.

According to the second aspect of the invention, when the lubricating oil is replenished, the residual lubricating oil in the engine is discharged according to the degree of deterioration,
After that, new lubricating oil was replenished until the oil level reached the upper limit position, so it is possible to increase the proportion of new lubricating oil by the amount of forcibly discharging deteriorated lubricating oil, and the quality of lubricating oil Can be kept in a stable state,
The lubrication function can be maintained for a longer period of time.

According to the third aspect of the present invention, not only the amount of lubricating oil exchanged increases as the degree of deterioration increases, but also the amount of lubricating oil exchange is performed earlier, so that the quality of lubricating oil can be maintained in a stable state.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 6 are views for explaining a lubricating oil supply device for an engine according to an embodiment of the present invention. FIG. 1 shows an overall configuration of an engine-driven air conditioner to which the device of the present embodiment is applied. 2 is a schematic diagram showing the lubricating system of the engine of this embodiment, FIG. 3 is a system diagram showing the lubricating oil path of the device of this embodiment, FIG. 4 is a block diagram of the device of this embodiment, FIG. FIG. 6 is a map showing the degree of deterioration of the lubricating oil, and FIG. 7 is a flow chart for explaining the operation of the apparatus of this embodiment.

FIG. 1 is a diagram showing the overall construction of the apparatus of this embodiment.
In FIG. 1, 1 is an engine-driven air conditioner, which is composed of an outdoor air conditioning unit 2 and an indoor air conditioning unit 3. The indoor air conditioning unit 3 includes an indoor heat exchanger for refrigerant 4, an expansion valve 18 for reducing pressure, and an indoor heat exchange blower fan (not shown). The outdoor air conditioning unit 2 includes an engine room 7 in which an engine 5, compressors 6, 6 and the like are arranged, a main accumulator 8, a sub accumulator 9, an electrical equipment box 50, and a pipe line connecting each device. It is provided with an installed piping chamber 10 and an outdoor heat exchange chamber 14 in which a refrigerant outdoor upper and lower heat exchangers 11, 12 and an engine cooling water heat exchanger (hot water heat exchanger) 13 are arranged. There is.

The engine 5 is a water-cooled gas fuel engine. An intake pipe 21a is connected to an intake port of the engine 5, and a gas mixer 21b and an air cleaner 21c are provided in the intake pipe 21a. The pipe 21a penetrates the top wall of the engine room 7 and the top wall of the outdoor heat exchange chamber 14 and opens to the outside.

The gas mixer 21b is connected to a supply pipe from an external gas fuel source in the terminal chamber 22 by a gas pipe 22d. A gas mixer 21 is installed in the gas line 22d.
A flow control valve 22a integrated with b, a zero governor (pressure reducing valve) 22b, and two electromagnetic valves 22c are interposed. The exhaust port of the engine 5 has an exhaust pipe 23a.
Is connected to the exhaust pipe 23a, and the exhaust gas heat exchanger 23 is connected to the exhaust pipe 23a.
b, an exhaust silencer 23c, and a mist separator 23d are interposed, and the exhaust pipe 23a opens from the heat exchange chamber 14 to the outside. Further, reference numeral 24a is an oil tank for storing lubricating oil, and when the amount of lubricating oil in the oil pan 5b decreases, a solenoid valve 24b is opened by a lubricating oil supply device, which will be described later, so that the lubricating oil is supplied by gravity. There is.

The output shaft of the engine 5 has a clutch 6a,
The compressors 6 and 6 are connected via 6a. The discharge port of the compressor 6 is connected to the refrigerant upper and lower outdoor heat exchangers 11 and 12 through the refrigerant pipes 200 and 16a, the four-way valve 15 switched to the cooling operation position, and the refrigerant pipe 16a, The both heat exchangers 11 and 12 are connected to the refrigerant pipe line 17a from the refrigerant indoor heat exchanger 4 in the terminal chamber 22 via the refrigerant pipe line 16c, the main accumulator 8 internal heat exchanger, and the refrigerant pipe line 101. It is connected by 101a.
In addition, 102 is a dryer and 103 is a filter which bypasses this.

The refrigerant line 17b from the indoor heat exchanger 4 is connected to the refrigerant line 100 from the outdoor unit 2 in the terminal chamber 22 by a joint 100a. The refrigerant line 100 includes a four-way valve 15, a refrigerant line 16d,
Through the main accumulator 8, the refrigerant pipe 202, the sub accumulator 9, and the refrigerant pipe 201, the compressors 6 and 6 are connected.
Is connected to the suction port of. In addition, 300 and 301 are capillaries, 210 and 211 are respectively a combination of a temperature detector and a capillary, and are for detecting the level of the liquid phase refrigerant in the accumulator 8 by detecting the cooling temperature. Is. Further, 302 is an on-off valve, 303
Is an oil discharge passage, and when the amount of oil accumulated in the lower part of the accumulator becomes large, the on-off valve is opened manually or automatically so that the oil flows from the accumulator 8 to the sub accumulator 9.

An oil separator 19a for separating lubricating oil in the refrigerant is provided between the refrigerant pipes 200 and 16a, and when the amount of lubricating oil separated by the separator 19a exceeds a predetermined value. The oil is returned to the main accumulator 8 via the oil strainer 19b and the solenoid valve 19c which opens when the value exceeds the predetermined value. The lubricating oil is also returned to the sub accumulator 9. Further, the refrigerant pipeline 16a is connected to the main accumulator 8 via an oil strainer 20a and a solenoid valve 20b which opens when the pressure in the pipeline exceeds a predetermined value, thereby avoiding an abnormal rise in the refrigerant pipeline pressure.

The cooling jacket 28 of the engine 5 is also provided.
Regarding the cooling of b, when the cooling water temperature is below a predetermined value, the cooling water pump 28a, the water pipe 29a, the cooling jacket 28
b, water pipe 29a ', switching valve (thermostat valve)
A cooling jacket circulation circuit (engine cooling water circulation circuit), which is one of the low-temperature circulation circuits that circulates the cooling water in the route of 28c and the water pipe 29s, is configured.

When the cooling water temperature exceeds a predetermined value,
Cooling water pump 28e, water conduit 29e, exhaust gas heat exchanger 23b, water conduit 29e ', cooling water pump 28a, water conduit 29a, cooling jacket 28b, water conduit 29a', switching valve 28c, water conduit 29b, three-way valve 28d. , Water pipeline 2
9c, heat exchanger 13 for cooling water, water pipes 29d, 29p,
A high temperature circulation circuit that circulates the cooling water is configured through the cooling water pump 28e. The switching valve 28c
Is switched to the low temperature circulation position, the cooling water from the cooling water pump 28e flows in the direction of the water pipeline 29b through the bypass passage 29r. That is, the exhaust gas heat exchanger circulation circuit, which is another low temperature circulation circuit, is configured. As a result, the exhaust heat of the exhaust gas heat exchanger 23b passes through the three-way valve 28d and is discarded by the cooling water heat exchanger 13, or is given to the refrigerant by the heater 29g of the accumulator 8. As a result, the exhaust heat can be used even during warm-up at the time of start-up, which is particularly effective when quick heating is required.

In the above cooling system, 30a is a reservoir tank for cooling water, which is a water pipe 30c and an inlet 30.
It is connected to the heat exchanger 13 for cooling water via b. An inlet (not shown) is arranged above the cooling water reservoir tank 30a independently of the inlet 30b, and the inlet 30b is provided with a switching valve 28c.
Is also connected to one port (see A → A in FIG. 1). The port is provided with a cooling water jacket 28b through a throttle.
It is in constant communication with the cooling jacket circulation circuit, which allows air to escape from the cooling jacket circulation circuit. When the three-way valve 28d is switched, the engine cooling water is supplied to the heater 29g in the main accumulator 8 by the water conduit 29d, thereby supplying heat to the refrigerant. 90 is a solenoid valve,
Reference numeral 89 denotes an oil strainer, which opens the solenoid valve 90 when the load on the indoor unit 4 during cooling becomes particularly small so that the refrigerant bypasses the indoor unit 4 and flows to the accumulator 8 to balance the load. ing.

The casing 31 of the outdoor unit 2 is
This is a schematic structure in which columns are erected at four corners of a floor plate (not shown), the upper ends of the columns are connected by ceiling beams, and the left, right side, and ceiling surfaces are detachably covered by side plates and ceiling plates, respectively. Further, front and rear side surfaces of the casing 31 are outside air introduction openings, and wire meshes 38a and 38b functioning as filters are detachably attached to the respective openings. A discharge opening 37f for discharging the introduced outside air to the outside is formed on the ceiling surface, and the outside air is sucked into the outdoor heat exchanger 14 from the wire nets 38a and 38b at the discharge opening 37f. An outdoor heat exchanging blower fan 44 is disposed above the outdoor heat exchanger 14.

The outdoor heat exchange chamber 14, the engine room 7, and the piping chamber 10 are each defined by a partition plate 39,
The central partition plate that constitutes the ceiling of the engine room 7 has a ventilation air discharge port 40b that opens into the outdoor heat exchange chamber 14.
It is formed in the place. The outlet 40b is surrounded by a sound deadening box 40c having a sponge-like sound absorbing sheet attached inside. A box-shaped air introduction chamber 4 defined by a partition plate is provided between the engine room 7 and the piping room 10.
6 are formed, and a large number of jet ports 45a for blowing ventilation air into the engine room 7 are formed on the partition plate between the air introduction chamber 46 and the engine room 7 substantially evenly over the entire surface. . Further, an engine room air intake port 46a is formed in a partition plate between the air introducing chamber 46 and the piping chamber 10, and a ventilation fan 47 is arranged in the intake port 46a.

Various control devices, which will be described later, are housed and arranged in the electrical equipment box 50.
An air intake port 50a is formed on the bottom surface of 0, and an exhaust port 50b is formed on the upper side surface. An outside air intake 33b is formed on the floor plate of the casing 31.
The outside air that has passed through b is introduced into the piping chamber 10, and a part of the outside air passes through the inside of the electrical equipment box 50 from the air inlet 50a and is discharged through the discharge port 50b to ventilate the inside of the box 50.

As shown in FIG. 2, the engine 5 of this embodiment is a water-cooled parallel four-cylinder OHV engine that uses city gas, propane gas, etc. as a fuel, and an oil pan 5b is fastened to the lower mating surface of the cylinder block 5a. Then, the cylinder head 5c is fastened to the upper mating surface, and the head cover 5d is attached to the cylinder head 5c. The cylinder head 5c is fixed on the floor plate in the casing 31 through an engine mount made of an elastic body (not shown). There is. A piston 5 slidably inserted in the cylinder bore of the cylinder block 5a.
e is connected to a crankshaft 5g by a connecting rod 5f, and a valve train 5h is arranged on the cylinder head 5c. The valve system 5h includes an intake valve 5i and an exhaust valve 5
i is opened and closed by a cam shaft 5l arranged near the crankshaft 5g via a rocker arm 5j and a push rod 5k.

The lubricating system of the engine 5 is shown in FIGS.
As shown in FIG.
The lubricating oil therein is sucked up through an oil strainer 61b, is pressure-fed through an oil filter 62 to a main gallery 63 arranged in the center of the cam shaft, and is distributed and supplied to the lubricated parts in various places of the engine from here. There is. Reference numeral 61a is a relief valve for keeping the discharge pressure of the oil pump 61 at a predetermined value or less, and 62b is built in the oil filter 62, and bypasses the lubricating oil when the passing pressure of the filter 62 becomes a predetermined value or more. The relief valve 63a is a main gallery 63 and an oil filter 6.
It is an oil passage connecting the two.

The lubrication system is the main gallery 63.
To the journal 64 of the camshaft 5l, the journal 65 of the crankshaft 5g, and the large end portion 66 of the connecting rod 5f, and to return to the oil pan 5b, and the main gallery 63 through the oil passage 5t. Oil is supplied to each valve operating system 5h of each cylinder head 5c, and an oil pan 5b is supplied.
The second lubrication system B that is returned to the output gear and the output extraction shaft (PTO) disposed in the middle gear case m from the oil filter 62.
The shaft 67 includes a bearing 67 and a gear 68, and a third lubricating system C that returns the lubricating oil that has dropped to the bottom of the gear case m into the oil pan 5b. In addition, each head cover 5
The breather chamber 5m formed in d is connected to the oil separator portion 76 via the breather passage 69, and the lubricating oil separated by the oil separator portion 76 passes through the oil return hose 80 and is stored in the oil pan 5b. Returned to.

The oil pan 5b is connected to the engine 5 via oil hoses 24c and 24d as oil supply means.
An oil tank 24a, which is separate from the oil pan 5b and is arranged at a higher position than the oil level of the oil pan 5b, is connected to the oil pan 5b, and a solenoid valve 24b is provided in the middle of the oil hoses 24c and 24d. When the solenoid valve 24b is opened, the lubricating oil is replenished in the oil pan 5b by its own weight.

Further, an oil drain hose 70a having an electromagnetic valve 70 interposed therebetween is connected to the bottom wall of the oil pan 5b as an oil drain means, and the drain port of the oil drain hose 70a is connected to the oil drain. It is inserted in the waste oil tank 71 arranged at a low place by the bottom wall of the pan 5b. When the solenoid valve 70 is opened, the lubricating oil is discharged into the waste oil tank 71 by its own weight. Here, as the oil discharging means, the oil pan 5 is used.
The oil drain pipe 72 may be inserted in the b, and the oil drain pipe 72 may be configured to forcibly discharge the oil to the waste oil tank 74 via the oil drain pump 73.

The present embodiment is provided with a lubricating oil supply device for automatically supplying the lubricating oil in an amount corresponding to the amount of lubricating oil consumed and the degree of deterioration of the lubricating oil to the oil pan 5b. As shown in FIG. 4, this lubricating oil supply device includes an engine speed detection sensor 91a, an oil level detection sensor 91b for detecting a lubricating oil level in an oil pan, a load detection sensor 91c, and an oil deterioration degree detection sensor. 91d and the detection values from the respective sensors 91a to 91d are input, and the solenoid valve 24b as the oil supply means and the solenoid valve 7 as the oil discharge means.
The ECU 92 controls the opening / closing timing of 0. The load detection sensor 91c is specifically one or more of sensors that detect the throttle opening, the fuel supply amount, and the boost pressure.

The ECU 92 uses the engine speed from the engine speed detection sensor 91a as the load detection sensor 9a.
1c, the engine speed accumulating means 92a for correcting and accumulating, the memory 92b for storing the accumulative total engine speed, and the accumulative total engine speed as the reference accumulative number. When the solenoid valve 24b is controlled to open and close so that the reference replenishment amount is supplied when
Depending on the oil supply / drainage control means 92c for controlling the opening / closing of the solenoid valve 70 so that the residual lubricating oil in the engine is discharged in an amount corresponding to the oil deterioration degree, and the above-mentioned reference integrated number depends on the factors that affect the deterioration degree of the lubricating oil. And a reference integrated number correction means 92e for performing correction.

The reference integrated number correction means 92e is shown in FIG.
As shown in FIG. 6, a deterioration map value indicating a change in the base number of the lubricating oil according to the types of the engine fuel gas A, B and the lubricating oil A, B is input via the correction coefficient memory 92i, The deterioration degree of the lubricating oil is judged based on each map value and the number of times Tn of replenishment from the memory 92f which stores the number of times of replenishment, and the larger the degree of deterioration is, the smaller the reference cumulative number is corrected. It should be noted that this deterioration degree is not a detection value that is actually measured and detected, but is a set value that is obtained by a preliminary test and is input to the memory. In this case, the oil type and the fuel gas type from the oil type selection key 91e and the fuel gas type selection key 91f are input to the reference integrated number correction means 92e. The gas A indicates city gas, propane gas, etc., and the gas B indicates low-calorie city gas, butane gas, etc.

The oil supply / drainage control means 92c reads the amount of residual lubricating oil in the engine from the oil level detecting sensor 91b and the lubricating oil deterioration degree from the oil deterioration degree detecting sensor 91d, and sets it to a preset deterioration degree. While controlling the opening / closing of the oil discharge solenoid valve 70 to discharge the corresponding amount of oil,
After the oil is drained, the supply solenoid valve 24b is controlled to open and close until the oil level detection sensor 91b reaches the upper limit. Here, the lubricating oil replenishment amount may be obtained by the time until the oil level reaches the upper limit position at the time of replenishing the lubricating oil, and the next replenishment timing may be controlled from this replenishment amount. Can eliminate the oil level detection sensor.

Further, the ECU 92 is provided with an engine operating time accumulating means 92g and a memory 92h for storing the accumulated total operating time, so that the replenishment timing is advanced according to the total operating time. Has been done. For example, deterioration can be effectively suppressed by gradually shortening the replenishment interval, such as every 500 hours during operating hours from 0 to 2000 hours and every 300 hours from 2000 to 4000 hours.

Next, the function and effect of this embodiment will be described. In the air conditioner 1 of this embodiment, the four-way valve 13 is switched to the outdoor heat exchanger side during the cooling operation. The refrigerant gas that has been compressed by the compressors 6 and 6 to have a high temperature and high pressure is supplied to the refrigerant outdoor heat exchangers 11 and 12 via the refrigerant pipe 16a, the four-way valve 15 and the refrigerant pipe 16b. It is liquefied by being cooled by the outside air. The liquefied high-pressure refrigerant liquid passes through the main accumulator 8 by the refrigerant pipe 16c and is decompressed by the expansion valve 18 of the refrigerant pipe 17a. The decompressed low-pressure refrigerant liquid takes heat from the indoor air in the indoor heat exchanger 4 and evaporates, and the evaporation heat causes a cooling effect to cool the room.

At the time of heating, the four-way valve 15 is switched to the indoor heat exchanger side, and the high-temperature, high-pressure gas refrigerant gas from the compressed air 6, 6 enters the indoor heat exchanger 4 via the refrigerant pipes 16a, 17a. It is supplied, where it is cooled by the indoor air and liquefied, and the condensation heat in this case warms the indoor air, and a heating effect is obtained.

Next, the basic operation of the lubricating oil supply system of this embodiment will be described with reference to the flow chart of FIG. First,
The reference integrated number for replenishing the lubricating oil is read (step 1). The integrated number in this case means the total number of engine revolutions that is integrated while correcting the engine revolution according to the engine load. Next, the fuel gas type, the lubricating oil type, and the number of times of replenishment are read as factors that affect the deterioration degree of the lubricating oil to the left and right (steps S2 and S3), and the corrected integrated number obtained by correcting the reference integrated number based on these factors is calculated. Required (Step S
4). In this case, for example, as shown in FIG. 5, when the previous number of times of replenishment is one, the corrected cumulative number is gas A (T ₂
′ −T ₁ ′), the gas B has a small value such as (T ₂ −T ₁ ).
Further, as shown in FIG. 6, the correction integrated number is larger in the case of oil A than in the case of oil B.

Next, when the total integrated number of engines after the previous replenishment has reached the above-mentioned corrected integrated number, the amount of drainage according to the degree of oil deterioration or the oil deterioration factor is set as the opening time T of the drainage solenoid valve. (Steps S5 and S6), and the oil drain solenoid valve 70 is opened during the opening time T (Steps S7 to S6).
9). As a result, the amount of residual lubricating oil in the engine according to the degree of deterioration is drained.

Then, the refueling solenoid valve 24b is opened until the oil level detection sensor 91b is turned on, that is, the amount of lubricating oil in the engine becomes the reference amount (steps S10 to S).
12), which completes the replenishment of the lubricating oil.

As described above, according to the present embodiment, the reference integrated number to be replenished with the lubricating oil is corrected based on the factor that affects the deterioration degree of the lubricating oil, and the engine speed is corrected according to the load. The lubricating oil is replenished when the accumulated total number reaches the above corrected total number, so it is possible to suppress quality deterioration due to deterioration of the lubricating oil and maintain the lubrication function for a long time, which improves the engine life. it can.

When replenishing the lubricating oil, the residual lubricating oil in the engine is drained and the new lubricating oil is replenished to the upper limit position of the oil level, so that the ratio of the new lubricating oil amount can be increased. Can stabilize the quality of the lubricating oil for a long time,
The engine life can be further improved.

In the above embodiment, the replenishment timing is determined by the engine speed integrated number, but an oil level detection sensor capable of detecting the oil level itself is provided, the consumption amount is calculated from the detected value, and the consumption amount and each of the above detections are detected. Sensor 91a,
The refueling timing may be determined based on the engine operating state from 91c. In this case, the refueling interval can be shortened when the oil consumption is large.

In this case, an oil discharge valve is further provided, and when the oil consumption amount is less than the reference value, the forced oil discharge is performed up to the reference level, and then the amount of lubricating oil corresponding to the oil discharge amount is replenished. It is also possible to prevent the deterioration of the lubricating oil when the consumption amount is small.

Furthermore, an optical oil deterioration degree detection sensor is provided, and when the oil deterioration degree from the sensor reaches a set value, the oil drainage is performed even if the above-mentioned total engine speed does not reach the reference integrated speed. You may make it supply.
As this deterioration level detection sensor, there is an optical type sensor that detects the deterioration state from the transmittance according to the wavelength of a specific light, and by using this together, replenishment can be performed at the optimum timing in the case of rapid deterioration. For example, it is effective when the engine deteriorates with time, the amount of blow-by gas rapidly increases due to operating conditions, or when sudden deterioration occurs due to suction of a refrigerant or the like. In addition, depending on the type of fuel gas and the conditions under which it is used, deterioration of the lubricating oil may be accelerated. For example, with low-calorie gas, it is common to set the maintenance time to half that of propane and city gas. Since there are many types of low-calorie gas, there is a large difference in the deterioration rate, and it is effective in such cases.

In FIG. 4, the total engine speed memory 92
In b, two types are stored: a total of the total engine speeds corrected according to the load, and a total engine speed that is set to 0 and re-accumulated for each oil replenishment or oil replenishment accompanied with oil discharge. . In this control, the cumulative value is used as the total engine speed, and a plurality of values, for example, 6 million rotations, 12 million rotations, 18 million rotations, etc. are stored as the reference integrated speed before correction, and these values are corrected. Each time the cumulative total engine speed exceeds the value, replenishment or replenishment with oil discharge is performed. As another control method, the total engine speed, which is set to 0 for each oil replenishment or replenishment accompanied with oil drainage, is a value corrected according to the deterioration degree and the number of replenishment based on one reference integrated number before correction It is also possible to perform replenishment or replenishment accompanied with oil drain every time it exceeds. As the number of times of replenishment increases, the degree of deterioration of the lubricating oil remaining before replenishment increases, so the reference integrated number is corrected to be smaller.

Here, in the replenishment or the replenishment involving the oil drainage, the replenishment amount, or the oil drainage amount and the replenishment amount may be constant, or the one or both of the deterioration degree and the number of times of replenishment is larger, the replenishment amount or the drainage amount. The amount of oil and the amount of replenishment may be increased. This makes it possible to prevent deterioration of the quality of the lubricating oil more reliably.

As yet another control method, the reference integrated number itself is not corrected and is always constant, and the amount of drained oil is increased in accordance with one or both of the degree of deterioration and the number of times of replenishment. You can increase it.

[0049]

As described above, according to the invention of claim 1,
The total number of engine revolutions accumulated by compensating the engine revolutions according to the load is used to correct the reference number of revolutions based on factors that affect the degree of deterioration such as fuel type, lubricating oil type, or the number of lubricating oil replenishments. Since the lubricating oil is replenished when the corrected cumulative number is reached, there is an effect that quality deterioration due to deterioration of the lubricating oil can be suppressed and the lubricating function can be maintained for a long time.

According to the second aspect of the invention, after the residual lubricating oil in an amount corresponding to the degree of deterioration of the lubricating oil is discharged, the lubricating oil is replenished until the oil level reaches the upper limit position. There is an effect that the quality can be maintained for a longer period by increasing the ratio.

According to the third aspect of the present invention, not only the amount of lubricating oil exchanged increases as the degree of deterioration increases, but also the amount of lubricating oil exchanged is performed earlier, so that the quality of the lubricating oil can be maintained in a more stable state. is there.

[Brief description of drawings]

FIG. 1 is a system diagram showing an overall configuration of an engine-driven air conditioner according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a lubricating system of the engine of the embodiment.

FIG. 3 is a system diagram showing a lubricating oil path of the engine of the embodiment.

FIG. 4 is a block configuration diagram of a lubricating oil control device of the above-described apparatus.

FIG. 5 is a map diagram showing the degree of deterioration of the lubricating oil of the apparatus of the above embodiment.

FIG. 6 is a map diagram showing the degree of deterioration of the lubricating oil of the apparatus of the above embodiment.

FIG. 7 is a flow chart for explaining the operation of the apparatus of the above embodiment.

[Explanation of symbols]

 5 Engine 24b Electromagnetic valve (lubrication means) 70 Electromagnetic valve (drainage means) 73 Oil drain pump (drainage means) 91a Engine speed detection means 91b Oil level detection means 92a Engine speed integration means 92c Lubrication and oil control means 92e Reference integrated number correction means

Claims (3)

[Claims] 1. An engine load detecting means, an engine speed detecting means, and an engine speed integrating means for integrating the engine speed while correcting the engine speed to a larger value as the load increases according to the engine load. Lubricating means for replenishing the lubricating oil into the engine when the total engine speed reaches a preset reference cumulative number;
A reference integrated number correction means for performing correction based on at least one of the factors that affect the degree of deterioration of the lubricating oil, such as the type of lubricating oil or the number of times of lubricating oil replenishment, or the deterioration degree detected by the deterioration degree detection means; A lubricating oil supply device for an engine, comprising: an oil supply control means for controlling the oil supply means so that the lubricating oil is supplied when the integrated engine speed reaches the corrected integrated number. 2. The engine load detecting means, the engine speed detecting means, and the engine speed integrating means for integrating the engine speed while correcting the engine speed to a larger value as the load increases according to the engine load. Oil supply means for replenishing lubricating oil when the total engine speed reaches a preset reference integrated number, discharge means for discharging residual lubricating oil in the engine, and oil level detection for detecting the amount of lubricating oil in the engine Means, a fuel that affects the degree of deterioration of the lubricating oil, a first deterioration degree set value that is set based on one or both of the types of the lubricating oil, and a second value that is set larger as the number of lubrication oil replenishments increases. And the third deterioration degree set value in which the first deterioration degree set value is corrected to a larger value as the number of lubrication oil replenishments increases,
The amount of residual lubricating oil in the engine is discharged so that the amount of residual lubricating oil in the engine is discharged according to the deterioration degree by any one of the four deterioration degree detection values based on the deterioration degree detecting means arranged so as to come into contact with the lubricating oil. An oil discharge control means for controlling the oil means, and an oil supply control means for controlling the oil supply means so that the lubricating oil is supplied until the oil level reaches the upper limit position after the oil is discharged by the oil discharge means. Characteristic engine lubricating oil supply device. 3. The first deterioration degree set value, which is set based on one or both of the fuel and the type of the lubricating oil, which influence the deterioration degree of the lubricating oil, and the number of times of lubricating oil replenishment is large. Arranged so that the second deterioration degree set value and the first deterioration degree set value, which are set to be larger, are corrected to a larger value as the number of times of replenishing the lubricating oil is larger, and the lubricating oil is contacted. According to the deterioration degree by any one of the four deterioration degree detection values based on the deterioration degree detecting means, the reference integration number correcting means for correcting the reference integration number to be smaller as the deterioration degree is larger is provided. An engine lubricating oil supply device characterized by the above.